Question

18builders bind 900 in 10 days. How many do 660 in 12 days

Answer 1

Answer:

900-----10----18

1---------10-----18/900

1----------1-----18/900*10

660 books------1 day----1/5*660 binders

660 books-----12days----132/12=11 binders..

Step-by-step explanation:

Answer 2

Let the required no of binders be X.

Less books , Less binders (Direct Proportion)

More days, Less binders (Indirect proportion)

Books 900:660 Days 12 : 10 }⋮⋮ 18:x

Therefore, (900 * 12 * x) = (660 * 10 * 18)

=> x = 11